Case 1; Case 2; Case 3; Case 4 - Avaya Communication Server 1000 Series Reference

Case 1

This case applies to a call from an ESN node to a telephone at either a cut-through or a
senderized main circuit switch:
1. The node seizes a TIE Trunk to the main circuit switch and then pauses, waiting for
2. The node then outpulses the telephone DN digits to the main circuit switch.

Case 2

This case involves a call from an ESN node to a tributary circuit switch by a cut-through main
circuit switch. This is similar to Case 1, except the initial digit(s) outpulsed by the node is an
access code for a TIE Trunk connecting the main circuit switch to the tributary circuit switch:
1. The node inserts a fixed pause (for a delay for a dial tone) after the access code,
2. The node resumes outpulsing either when the fixed pause interval elapses or a dial
3. The tributary circuit switch resumes outpulsing of the DN.

Case 3

This case involves a call from an ESN node to an off-network telephone by a cut-through main
circuit switch:
1. The access code outpulsed by the ESN node is for a CO trunk, instead of TIE Trunk
2. After the access code is required, there must be a fixed pause or a delay for a dial
3. The resumed outpulsing consists of the PSTN number rather than a circuit switch

Case 4

This case applies when the main circuit switch is senderized and tandems a call from the node
to a tributary circuit switch or CO.
When the main circuit switch is senderized, the beginning of the call setup sequence is the
same as in
digits without pausing. If the main circuit switch can receive DTMF digits, outpulsing should be
Electronic Switched Network Reference — Signaling and Transmission
the main circuit switch to receive digits.
unless both main and tributary circuit switches are step-by-step (SXS) switches.
tone is detected.
as in Case 2.
tone even when both the main circuit switch and the CO are SXS switches.
number.
Case 3 on page 25. However, once the node begins outpulsing, it outpulses all
Call completions
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